Reorganize headers again

include/ucore/ucore_seq.h

@@ -0,0 +1,21 @@
+#ifndef SEQ_H_
+#define SEQ_H_
+#include <stdint.h>
+
+// Check if a is before b, taking care of wrap arounds
+static inline int seq_before(uint32_t a, uint32_t b)
+{
+            return (int32_t)(a - b) < 0;
+}
+
+// check if a is before b, taking care of wrap arounds
+#define seq_after(a, b)   before(b, a)
+
+//check if a is between b or c
+static inline int seqbetween(uint32_t a, uint32_t b, uint32_t c)
+{
+        return c - b >= a - b;
+}
+
+
+#endif